Motorgen - Automotive Events, Meets, Cruises and Forums - View Single Post - PV protection (check ball) has to be drilled out for boost?

TimAT · 07-27-2009, 03:23 PM

[quote=94cobra69ss396;28041]How much pressure does it take to open the check ball? I'm assuming it would be more than 10psi since its purpose is to protect the PV in the case of a backfire in the intake.

QUOTE]

I'm interested in this one too. The boost comes in from the top and would tend to SEAT that checkball. In the event of a backfire, it lifts that ball off the seat and allows the excess pressure to vent into the venturis instead of thru the PV. I can see how high boost could lift the checkball, but I'd not think it would be too likely because the pressure would be the same on both sides.

07-27-2009, 03:23 PM	#11
TimAT Senior Member Join Date: Dec 2008 Posts: 123 Tweet	[quote=94cobra69ss396;28041]How much pressure does it take to open the check ball? I'm assuming it would be more than 10psi since its purpose is to protect the PV in the case of a backfire in the intake. QUOTE] I'm interested in this one too. The boost comes in from the top and would tend to SEAT that checkball. In the event of a backfire, it lifts that ball off the seat and allows the excess pressure to vent into the venturis instead of thru the PV. I can see how high boost could lift the checkball, but I'd not think it would be too likely because the pressure would be the same on both sides.